FLUORESCENT  LAMP—A low-pressure mercury electric-discharge lamp in which a fluorescing coating on its inner surface transforms some of the ultraviolet energy generated by the discharge into light. GROUND—A    conducting    connection,    whether intentional or accidental, between an electrical circuit or equipment and the earth. GROUNDING  CONDUCTOR—Aconductor  used  to connect equipment or the grounded circuit of a wiring system to a grounding electrode. GROUNDING  ELECTRODE—A conductor embedded in the earth for maintaining ground potential on conductors connected to it. HAZARDOUS  LOCATION—An area where ignitable  vapors  or  dust  might  cause  a  fire  or explosion created by energy emitted from lighting or other electrical equipment. HYDROMETER—An  instrument  used  to  measure specific gravity. In batteries, hydrometers are used to indicate the state of change by the specific gravity of the electrolyte. INDUCTANCE—The property of a circuit that tends to oppose a change in the existing current flow. INDUCTION—The   act   or   process   of   producing voltage and current by the relative motion of a magnetic field across a conductor. INDUCTION MOTOR—A simple, rugged, ac motor with  desirable  characteristics.  The  rotor  is energized by transformer action (induction) from the  stator. INSULATION—A   material   used   to   prevent   the leakage  of  electricity  from  a  conductor  and  provide mechanical  spacing  or  support  as  protection  against accidental contact with the conductor. INSULATOR—A   device   having   high   electrical resistance;  used  for  supporting  or  separating conductors so as to prevent undesired flow of current from the conductors to other objects. ISOMETRIC WIRING DIAGRAM—A    diagram showing the outline of a structure and the location of equipment, such as panels, and junction boxes, and cable runs. MAINTENANCE—Day-to-day, periodic, or scheduled work required to preserve or restore a facility or equipment so that it can be used effec- tively for its designed purpose. It includes work to prevent damage to or the deterioration of a facility that would otherwise be more costly to restore. MEP—Mobile  electric  power. MILITARY SPECIFICATIONS (MILSPEC)— Technical  requirements  and  standards  adopted  by the Department of Defense that must be met by vendors selling materials to DoD. MILITARY STANDARDS (MIL-STD)—Standards of performance for components or equipment that must be met to be acceptable for military systems. MOCC—Mount-out  control  center. MOTOR—A machine that converts electrical energy to mechanical energy. It is activated by ac or dc voltage, depending on the design. MOTOR  LOAD—Any  device  driven  by  a  motor. Typical  loads  are  drills,  saws,  water  pumps, generators, and so forth. The speed and power capabilities of a motor must be matched to the speed and power capabilities of the motor load. MOTOR  STARTERS—Resistive devices placed in series with dc motor armatures to prevent the armature from drawing excessive current until armature speed develops counter emf. MSDS—Material Safety Data Sheet. A mandatory form that should accompany any hazardous mate- rials being issued to or used by naval personnel. NAVFACENGCOM—Naval Facilities Engineering Command. Manages the planning, design, and construction of the U.S. naval facilities around the world. NAVSUP—Naval Supply Command. NCBC—Naval Construction Battalion Center. NCF—Naval Construction Force. NEC®—National  Electrical  Code®. NFPA—National Fire Protection Agency. OHM—The unit of electrical resistance; that value of electrical resistance through which a constant potential difference of 1 volt across the resistance will maintain a current flow of 1 ampere through the resistance. OIC—Officer in charge. OPEN CIRCUIT—A circuit that does not provide a complete path for the flow of current. AI-2